Gray-Milne seismograph made by James White
1885
1885
1921
1908
1960
1971-1980
1930-1935
1930-1935
1930-1935
1930-1935
1899
1885
circa 1925
1921
1910
1910
1902
1880
1939
1899
1928
1910
1930-1935
circa 1925
1909
1880
1933-1936
1912
1898
1886
1930-1935
1930-1935
1937-1938
1930-1935
1907
1902
1930-1935
1930-1935
1930-1935
1930-1935
1939
1914
1885
1914
1914
1898